This guide will provide information on how to disable blood/gore on Portal. This guide will cover two different methods for disabling blood/gore on Portal. It also provides information about the console....

In this place, there are the videos and the objectives of Portal challenges.
Achievements to unlock: Basic Science - Rocket Science - Aperture Science
Practice is required to earn these achievements.
Good viewing ;)...

Camera Shy (with screenshots)

di Mister Jarate

No description, numbers only...

The Quick Camera Checklist

di Slim Dong Huhn

If you want to find the destroyable cameras for the achievement 'Camera Shy' all by yourself, because you want to make this achievement more challenging, use this simple checklist instead of a guide....

Получаем все достижения в игре Portal

di Marik78

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Transmission Received Achievement

di lonerunner

This guide is intended to help you easier find all transmissions and set them to their final location where they should receive transmission....